30919493 has 12 divisors (see below), whose sum is σ = 35086464. Its totient is φ = 27198600.

The previous prime is 30919489. The next prime is 30919501. The reversal of 30919493 is 39491903.

It is not a de Polignac number, because 30919493 - 2² = 30919489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30919463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 371 + ... + 7872.

It is an arithmetic number, because the mean of its divisors is an integer number (2923872).

Almost surely, 2^30919493 is an apocalyptic number.

It is an amenable number.

30919493 is a deficient number, since it is larger than the sum of its proper divisors (4166971).

30919493 is a wasteful number, since it uses less digits than its factorization.

30919493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8296 (or 8285 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 30919493 is about 5560.5299207899. The cubic root of 30919493 is about 313.8658906387.

The spelling of 30919493 in words is "thirty million, nine hundred nineteen thousand, four hundred ninety-three".